the stigma is strong when it comes to drugs.... what you are outlining is functional drug addicts. there are far more functional drug addicts than dysfunctional, just think about all the peeps that need "legal meds" to get by in life...

but if we get into the crux of the situation, lets look at the definition of what a drug is.

Drug - a medicine or other substance which has a physiological effect when ingested or otherwise introduced into the body.

Now.... lets look at WHAT has a physiological effect on the body when ingested or introduced into the body ;) Then we have the realization that almost EVERYTHING we put into our bodies can be classed as a drug...